She answered the phone and, to her great 'joy', heard her son's voice on the line. [=she felt very happy when she heard her son's voice]
“You've spent hours looking for it. Any 'joy'? [='luck']” “No 'joy' whatsoever, I'm afraid. I can't find it.”
They were 'shouting/jumping for joy'. [=they shouted/jumped because they were very happy]
(..) Its okay, take it. I was just showing mother out. Excuse me. Anastasia! - Kate, wait. - It was a joy to meet you. I'm having the whole family for dinner at my house. Christian's sister Mia is back from Paris, so lets come. We'll see mother. (..)2015 Fifty Shades of Grey